A study on the characteristics of soots formation in spray flame for DI diesel engine

J. Ocean Eng. Technol. 1996;10(4):128-140.

직접분사식 디젤기관의 화염 속에서 생성되는 그을음의 특성에 관한 연구

라진홍,안수길

부경대학교 탐양호기관장,부경대학교 공과대학 제어기계공학과

Keywords: Spray flame, DI Diesel engine, Schlieren method, Light extinction method, Sootimage, Soot concentration

핵심용어: 분무화염, 직접분사식 디젤기관, 슈리렌법, 투과광감쇄법, 그을음 화상, 그을음 농도

Abstract

To analyze a formation process of the soots in spray flame in the combustion chamber, an optically accessible DI Diesel engine was used for visualization. The images of the flames and soots were visualiaed with high speed camera by Schlieren method and Light extinction method. The spray flame and soot images on the films were analyzed at the various engine operating conditions. Soot distributed widely in spray flame and its concentration was about $100g/m^3$ at the position close by nozzle tip of spray flame region, however it decreased below $20g/m^3$ at the corner of combustion chamber due to soot oxidation.